基于计算流体动力学解析的液压锥阀噪声评价

Noise Appraisement of Hydraulic Poppet Valve Based on CFD Analysis

结合试验结果和计算流体动力学的解析结果,研究液压锥阀的噪声评价方法。对Oshima和Ichikawa试验所用的液压锥阀进行计算流体动力学解析,得到流入和流出两种工况下,对应不同的锥面夹角时阀座上的压力分布和速度分布。对压力和速度进行积分加权分析,结合前人试验所得液压锥阀噪声特性,找到一种基于压力分布和漩涡脱离回流的液压锥阀噪声特性评价方法。应用该方法对实际液压锥阀进行噪声评价,评价结果与试验结果一致,证明了该方法的可行性。

Combining experimental solution and CFD analyses, a method to appraise noise of poppet valve was studied. The poppet valve used in experiments by Oshima and Ichikawa,was analyzed by using CFD method. Corresponding pressure and velocity distribution on valve seat of different degrees between poppet and seat are obtained under conditions of flow in and flow out respectively. Consulting the noise characteristic curves obtained by experiments, CFD solution was analyzed by weighted integral method. A noise appraisal index of poppet valve was found based on pressure distribution and backflow of vortex shedding. An effective method was proposed to appraise the noise of hydraulic poppet valve. This method was used in appraising the noise of real poppet valves, then the appraisal results are consistent with the experimental ones ,and its feasibility is proved.